How to choose a Long-lasting weather-resistant UV absorber?

During the use of polymer material, ultraviolet radiation silently breaks chemical bonds, causes yellowing, and leads to a deterioration in the materials’ mechanical properties. Issues such as yellowing of automotive headlights, cracking of photovoltaic backsheets, and chalking of outdoor plastic products are fundamentally caused by UV-induced aging and degradation of the materials.

Why are general UV absorbers unsuitable for high-temperature processing or long-term outdoor applications?

General UV absorbers volatilize and decompose under high temperatures (especially when processing temperatures exceed 280°C).

Conventional UV absorbers migrate and leach out, causing the material surface to whiten and contaminating molds.

The UV absorption efficiency of general UV absorbers will diminish over time.

What are the essential properties of long-lasting, weather-resistant UV absorbers?

Thermal stability ≥ 330°C

High molecular weight and excellent migration resistance

Broad and strong UV absorption peak

Good compatibility with HALS and antioxidants

OMNISTAB Long-Lasting Weather-Resistant UV Absorber

OMNISTAB UV1577

UV1577 features extremely low volatility and excellent compatibility, with outstanding thermal stability. It is particularly suitable for applications requiring high weather resistance, such as high-performance polymers like PC, PET, and acrylics.

OMNISTAB UV1164

UV1164 is particularly suitable for engineering plastics such as nylon, providing long-lasting light stability. It is widely used in automotive components, electronics, and electrical appliances.

OMNISTAB UV366

UV366 is particularly suitable for products requiring high-temperature processing (e.g., PC, PET, nylon) or long-term outdoor use.

When used in polyester fabrics, UV366 adheres firmly to the fiber surface, offering wash resistance and long-lasting protection. It effectively inhibits UV degradation reactions in fiber materials, preserving fiber strength and color.

OMNISTAB UV460

UV460 exhibits good compatibility with various polymer materials and is widely used in the coatings, adhesives, and plastics industries. UV460 could enhance the weather resistance and yellowing resistance of automotive paints, industrial coatings, and wood coatings.